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diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst new file mode 100644 index 000000000000..04ee90099676 --- /dev/null +++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst @@ -0,0 +1,436 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _CEC_ADAP_LOG_ADDRS: +.. _CEC_ADAP_G_LOG_ADDRS: +.. _CEC_ADAP_S_LOG_ADDRS: + +**************************************************** +ioctls CEC_ADAP_G_LOG_ADDRS and CEC_ADAP_S_LOG_ADDRS +**************************************************** + +Name +==== + +CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS - Get or set the logical addresses + + +Synopsis +======== + +.. cpp:function:: int ioctl( int fd, int request, struct cec_log_addrs *argp ) + + +Arguments +========= + +``fd`` + File descriptor returned by :ref:`open() <cec-func-open>`. + +``request`` + CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS + +``argp`` + + +Description +=========== + +.. note:: This documents the proposed CEC API. This API is not yet finalized + and is currently only available as a staging kernel module. + +To query the current CEC logical addresses, applications call +:ref:`ioctl CEC_ADAP_G_LOG_ADDRS <CEC_ADAP_G_LOG_ADDRS>` with a pointer to a +:c:type:`struct cec_log_addrs` where the driver stores the logical addresses. + +To set new logical addresses, applications fill in +:c:type:`struct cec_log_addrs` and call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` +with a pointer to this struct. The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` +is only available if ``CEC_CAP_LOG_ADDRS`` is set (the ``ENOTTY`` error code is +returned otherwise). The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` +can only be called by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not +the ``EBUSY`` error code will be returned. + +To clear existing logical addresses set ``num_log_addrs`` to 0. All other fields +will be ignored in that case. The adapter will go to the unconfigured state. + +If the physical address is valid (see :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`), +then this ioctl will block until all requested logical +addresses have been claimed. If the file descriptor is in non-blocking mode then it will +not wait for the logical addresses to be claimed, instead it just returns 0. + +A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the +logical addresses are claimed or cleared. + +Attempting to call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` when +logical address types are already defined will return with error ``EBUSY``. + + +.. _cec-log-addrs: + +.. flat-table:: struct cec_log_addrs + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 16 + + + - .. row 1 + + - __u8 + + - ``log_addr[CEC_MAX_LOG_ADDRS]`` + + - The actual logical addresses that were claimed. This is set by the + driver. If no logical address could be claimed, then it is set to + ``CEC_LOG_ADDR_INVALID``. If this adapter is Unregistered, then + ``log_addr[0]`` is set to 0xf and all others to + ``CEC_LOG_ADDR_INVALID``. + + - .. row 2 + + - __u16 + + - ``log_addr_mask`` + + - The bitmask of all logical addresses this adapter has claimed. If + this adapter is Unregistered then ``log_addr_mask`` sets bit 15 + and clears all other bits. If this adapter is not configured at + all, then ``log_addr_mask`` is set to 0. Set by the driver. + + - .. row 3 + + - __u8 + + - ``cec_version`` + + - The CEC version that this adapter shall use. See + :ref:`cec-versions`. Used to implement the + ``CEC_MSG_CEC_VERSION`` and ``CEC_MSG_REPORT_FEATURES`` messages. + Note that :ref:`CEC_OP_CEC_VERSION_1_3A <CEC-OP-CEC-VERSION-1-3A>` is not allowed by the CEC + framework. + + - .. row 4 + + - __u8 + + - ``num_log_addrs`` + + - Number of logical addresses to set up. Must be ≤ + ``available_log_addrs`` as returned by + :ref:`CEC_ADAP_G_CAPS`. All arrays in + this structure are only filled up to index + ``available_log_addrs``-1. The remaining array elements will be + ignored. Note that the CEC 2.0 standard allows for a maximum of 2 + logical addresses, although some hardware has support for more. + ``CEC_MAX_LOG_ADDRS`` is 4. The driver will return the actual + number of logical addresses it could claim, which may be less than + what was requested. If this field is set to 0, then the CEC + adapter shall clear all claimed logical addresses and all other + fields will be ignored. + + - .. row 5 + + - __u32 + + - ``vendor_id`` + + - The vendor ID is a 24-bit number that identifies the specific + vendor or entity. Based on this ID vendor specific commands may be + defined. If you do not want a vendor ID then set it to + ``CEC_VENDOR_ID_NONE``. + + - .. row 6 + + - __u32 + + - ``flags`` + + - Flags. No flags are defined yet, so set this to 0. + + - .. row 7 + + - char + + - ``osd_name[15]`` + + - The On-Screen Display name as is returned by the + ``CEC_MSG_SET_OSD_NAME`` message. + + - .. row 8 + + - __u8 + + - ``primary_device_type[CEC_MAX_LOG_ADDRS]`` + + - Primary device type for each logical address. See + :ref:`cec-prim-dev-types` for possible types. + + - .. row 9 + + - __u8 + + - ``log_addr_type[CEC_MAX_LOG_ADDRS]`` + + - Logical address types. See :ref:`cec-log-addr-types` for + possible types. The driver will update this with the actual + logical address type that it claimed (e.g. it may have to fallback + to :ref:`CEC_LOG_ADDR_TYPE_UNREGISTERED <CEC-LOG-ADDR-TYPE-UNREGISTERED>`). + + - .. row 10 + + - __u8 + + - ``all_device_types[CEC_MAX_LOG_ADDRS]`` + + - CEC 2.0 specific: the bit mask of all device types. See + :ref:`cec-all-dev-types-flags`. It is used in the CEC 2.0 + ``CEC_MSG_REPORT_FEATURES`` message. For CEC 1.4 you can either leave + this field to 0, or fill it in according to the CEC 2.0 guidelines to + give the CEC framework more information about the device type, even + though the framework won't use it directly in the CEC message. + + - .. row 11 + + - __u8 + + - ``features[CEC_MAX_LOG_ADDRS][12]`` + + - Features for each logical address. It is used in the CEC 2.0 + ``CEC_MSG_REPORT_FEATURES`` message. The 12 bytes include both the + RC Profile and the Device Features. For CEC 1.4 you can either leave + this field to all 0, or fill it in according to the CEC 2.0 guidelines to + give the CEC framework more information about the device type, even + though the framework won't use it directly in the CEC message. + +.. _cec-versions: + +.. flat-table:: CEC Versions + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 4 + + + - .. _`CEC-OP-CEC-VERSION-1-3A`: + + - ``CEC_OP_CEC_VERSION_1_3A`` + + - 4 + + - CEC version according to the HDMI 1.3a standard. + + - .. _`CEC-OP-CEC-VERSION-1-4B`: + + - ``CEC_OP_CEC_VERSION_1_4B`` + + - 5 + + - CEC version according to the HDMI 1.4b standard. + + - .. _`CEC-OP-CEC-VERSION-2-0`: + + - ``CEC_OP_CEC_VERSION_2_0`` + + - 6 + + - CEC version according to the HDMI 2.0 standard. + + + +.. _cec-prim-dev-types: + +.. flat-table:: CEC Primary Device Types + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 4 + + + - .. _`CEC-OP-PRIM-DEVTYPE-TV`: + + - ``CEC_OP_PRIM_DEVTYPE_TV`` + + - 0 + + - Use for a TV. + + - .. _`CEC-OP-PRIM-DEVTYPE-RECORD`: + + - ``CEC_OP_PRIM_DEVTYPE_RECORD`` + + - 1 + + - Use for a recording device. + + - .. _`CEC-OP-PRIM-DEVTYPE-TUNER`: + + - ``CEC_OP_PRIM_DEVTYPE_TUNER`` + + - 3 + + - Use for a device with a tuner. + + - .. _`CEC-OP-PRIM-DEVTYPE-PLAYBACK`: + + - ``CEC_OP_PRIM_DEVTYPE_PLAYBACK`` + + - 4 + + - Use for a playback device. + + - .. _`CEC-OP-PRIM-DEVTYPE-AUDIOSYSTEM`: + + - ``CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM`` + + - 5 + + - Use for an audio system (e.g. an audio/video receiver). + + - .. _`CEC-OP-PRIM-DEVTYPE-SWITCH`: + + - ``CEC_OP_PRIM_DEVTYPE_SWITCH`` + + - 6 + + - Use for a CEC switch. + + - .. _`CEC-OP-PRIM-DEVTYPE-VIDEOPROC`: + + - ``CEC_OP_PRIM_DEVTYPE_VIDEOPROC`` + + - 7 + + - Use for a video processor device. + + + +.. _cec-log-addr-types: + +.. flat-table:: CEC Logical Address Types + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 16 + + + - .. _`CEC-LOG-ADDR-TYPE-TV`: + + - ``CEC_LOG_ADDR_TYPE_TV`` + + - 0 + + - Use for a TV. + + - .. _`CEC-LOG-ADDR-TYPE-RECORD`: + + - ``CEC_LOG_ADDR_TYPE_RECORD`` + + - 1 + + - Use for a recording device. + + - .. _`CEC-LOG-ADDR-TYPE-TUNER`: + + - ``CEC_LOG_ADDR_TYPE_TUNER`` + + - 2 + + - Use for a tuner device. + + - .. _`CEC-LOG-ADDR-TYPE-PLAYBACK`: + + - ``CEC_LOG_ADDR_TYPE_PLAYBACK`` + + - 3 + + - Use for a playback device. + + - .. _`CEC-LOG-ADDR-TYPE-AUDIOSYSTEM`: + + - ``CEC_LOG_ADDR_TYPE_AUDIOSYSTEM`` + + - 4 + + - Use for an audio system device. + + - .. _`CEC-LOG-ADDR-TYPE-SPECIFIC`: + + - ``CEC_LOG_ADDR_TYPE_SPECIFIC`` + + - 5 + + - Use for a second TV or for a video processor device. + + - .. _`CEC-LOG-ADDR-TYPE-UNREGISTERED`: + + - ``CEC_LOG_ADDR_TYPE_UNREGISTERED`` + + - 6 + + - Use this if you just want to remain unregistered. Used for pure + CEC switches or CDC-only devices (CDC: Capability Discovery and + Control). + + + +.. _cec-all-dev-types-flags: + +.. flat-table:: CEC All Device Types Flags + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 4 + + + - .. _`CEC-OP-ALL-DEVTYPE-TV`: + + - ``CEC_OP_ALL_DEVTYPE_TV`` + + - 0x80 + + - This supports the TV type. + + - .. _`CEC-OP-ALL-DEVTYPE-RECORD`: + + - ``CEC_OP_ALL_DEVTYPE_RECORD`` + + - 0x40 + + - This supports the Recording type. + + - .. _`CEC-OP-ALL-DEVTYPE-TUNER`: + + - ``CEC_OP_ALL_DEVTYPE_TUNER`` + + - 0x20 + + - This supports the Tuner type. + + - .. _`CEC-OP-ALL-DEVTYPE-PLAYBACK`: + + - ``CEC_OP_ALL_DEVTYPE_PLAYBACK`` + + - 0x10 + + - This supports the Playback type. + + - .. _`CEC-OP-ALL-DEVTYPE-AUDIOSYSTEM`: + + - ``CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM`` + + - 0x08 + + - This supports the Audio System type. + + - .. _`CEC-OP-ALL-DEVTYPE-SWITCH`: + + - ``CEC_OP_ALL_DEVTYPE_SWITCH`` + + - 0x04 + + - This supports the CEC Switch or Video Processing type. + + + +Return Value +============ + +On success 0 is returned, on error -1 and the ``errno`` variable is set +appropriately. The generic error codes are described at the +:ref:`Generic Error Codes <gen-errors>` chapter. + |